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Pd3P and PdP2 phases of ca. 4 nm particle diameter were prepared on a TiO2 support by an impregnation route. Data from the hydrogenation of acetylene under both non-competitive and competitive conditions showed that PdP2/TiO2 exhibits enhanced selectivity and stability relative to Pd3P. Furthermore, the selectivity produced over PdP2 (84% ethylene selectivity @ 100% acetylene conversion) compares...
Unsupported, bulk phase palladium sulfide has been studied for the selective hydrogenation of acetylene. The sample underwent significant change during thermal pretreatments, the extent of which depends on temperature. Exposure to hydrogen at temperatures of 150 °C or above results in the loss of sulfur from the sample, primarily as hydrogen sulfide. As sulfur is lost, the sample is progressively...
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